Avaya Configuring LLC Services User Manual

BayRS Version 14.00Part No. 308635-14.00 Rev 00September 19994401 Great America ParkwaySanta Clara, CA 95054Configuring LLC Services

308635-14.00 Rev 00Index-1AAck Timer for Xmt parameter, A-12acronyms, xviaddress mapping, 2-4 to 2-11address mask, A-15addresses, real and virtual, 2-

Index-2308635-14.00 Rev 00frame relay to virtual MAC addressing, 2-7Frame Relay Virtual MAC Address parameter, A-15IIBM NCP compatibility, 2-2Inactivi

308635-14.00 Rev 00Index-3publicationshard copy, xviiiRReceive Window parameter, A-10Reject Timer parameter, A-13Remote MAC parameter, A-4response PDU

308635-14.00 Rev 00xiTablesTable 1-1. LLC Command PDUs ...1-10Table 1-2. PDU

308635-14.00 Rev 00xiii PrefaceThis guide describes Logical Link Control (LLC) services and what you do to start and customize LLC services on a Norte

Configuring LLC Servicesxiv308635-14.00 Rev 00Text ConventionsThis guide uses the following text conventions:angle brackets (< >) Indicate that

Preface308635-14.00 Rev 00xv italic text Indicates file and directory names, new terms, book titles, and variables in command syntax descriptions. Whe

Configuring LLC Servicesxvi308635-14.00 Rev 00AcronymsThis guide uses the following acronyms:ANSI American National Standards InstituteAPPN Advanced P

Preface308635-14.00 Rev 00xvii NCP Network Communications ProgramNetBIOS Network Basic Input-Output SystemOSI Open Systems InterconnectionPDU protocol

Configuring LLC Servicesxviii308635-14.00 Rev 00Hard-Copy Technical ManualsYou can print selected technical manuals and release notes free, directly f

308635-14.00 Rev 001-1Chapter 1Logical Link Control OverviewLLC is a standard protocol within the ITU-T (formerly CCITT) 8802.2 and IEEE 802.x family

ii308635-14.00 Rev 00 Copyright © 1999 Nortel NetworksAll rights reserved. Printed in the USA. September 1999The information in this document is subje

Configuring LLC Services1-2308635-14.00 Rev 00Using LLC2 with SNA and NetBIOSSNA needs a connection-oriented data link layer for end-to-end packet seq

Logical Link Control Overview308635-14.00 Rev 001-3• WAN interfaces-- Frame relay Boundary Network Node (BNN) and Boundary Access Node (BAN) interface

Configuring LLC Services1-4308635-14.00 Rev 00Figure 1-1. Sample Frame Relay NetworkNortel Networks provides two ways to communicate directly with an

Logical Link Control Overview308635-14.00 Rev 001-5Boundary Network NodeThe Boundary Network Node refers to the RFC 1490 specification for routed SNA

Configuring LLC Services1-6308635-14.00 Rev 00Standard BAN uses the source route bridging frame format with local termination. Nortel Networks routers

Logical Link Control Overview308635-14.00 Rev 001-7LLC Service ClassesThe 802.2/LLC recommendations support three service classes:• Connectionless una

Configuring LLC Services1-8308635-14.00 Rev 00-- Controlling the flow of LSDUs over a data link layer connectionThe LLC2 also performs the following s

Logical Link Control Overview308635-14.00 Rev 001-9Type 2 OperationsType 2 operations have the following characteristics:• The LLC and its peer must e

Configuring LLC Services1-10308635-14.00 Rev 00Type 1 operations do not include definition of an acknowledgment PDU.Type 2 operations do not include a

Logical Link Control Overview308635-14.00 Rev 001-11Destination SAP (DSAP)The DSAP address field identifies one or more service access points (SAPs) f

308635-14.00 Rev 00iiiNortel Networks NA Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using t

Configuring LLC Services1-12308635-14.00 Rev 00Figure 1-5. SSAP Address FieldA value of 0 for the command/response identifier bit indicates that the P

Logical Link Control Overview308635-14.00 Rev 001-13Figure 1-6. SAPs for LLC ClientsSAP addresses are as follows:• Individual -- Designates a single S

Configuring LLC Services1-14308635-14.00 Rev 00Control FieldThe control field consists of one or two octets that designate command and response functi

Logical Link Control Overview308635-14.00 Rev 001-15Figure 1-7. LLC PDU Control Field FormatControl Field FormatsTable 1-2 further defines the purpose

Configuring LLC Services1-16308635-14.00 Rev 00Table 1-3 further defines the purpose of parameter bits in the PDU control field.Table 1-2. PDU Format

Logical Link Control Overview308635-14.00 Rev 001-17Table 1-4 further defines the purpose of each command and response PDU.Table 1-4. Command Names an

Configuring LLC Services1-18308635-14.00 Rev 00Command/ResponseControl Field Value DefinitionInformation (I) 6xxx0orxx evenThe I command PDU indicates

Logical Link Control Overview308635-14.00 Rev 001-19Command/ResponseControl Field Value DefinitionDisconnect (DISC) 53or43The DISC response PDU closes

Configuring LLC Services1-20308635-14.00 Rev 00Information FieldThe contents of the information field depend on the type of PDU it appears in, as foll

308635-14.00 Rev 002-1 Chapter 2LLC2 Routed over Frame RelayLLC2 (connection-oriented service) in a Nortel Networks router supports frame relay with b

iv308635-14.00 Rev 00for the security of its own data and information and for maintaining adequate procedures apart from the Software to reconstruct

Configuring LLC Services2-2308635-14.00 Rev 00Compatibility with IBM NCP 7.1 and LaterLLC2 routed over a frame relay (BNN) network is fully compatible

LLC2 Routed over Frame Relay308635-14.00 Rev 002-3 Figure 2-1. Sample Frame Relay Network Using LLC2Nortel Networks routerwith DLSw or APPNIBM Communi

Configuring LLC Services2-4308635-14.00 Rev 00FRAD-like FunctionalityToken ring, Ethernet, and SDLC end stations communicate with a frame relay-attach

LLC2 Routed over Frame Relay308635-14.00 Rev 002-5 When the router receives an LLC frame from the DLSw network with a dmac not starting with the virtu

Configuring LLC Services2-6308635-14.00 Rev 00Virtual MAC to Frame RelayFigure 2-2 illustrates a sample virtual MAC address to frame relay DLCI mappin

LLC2 Routed over Frame Relay308635-14.00 Rev 002-7 Frame Relay to Virtual MACFigure 2-3 illustrates a sample frame relay DLCI to virtual MAC address m

Configuring LLC Services2-8308635-14.00 Rev 00Physical MAC to Frame RelayFigure 2-4 illustrates a sample physical MAC address to frame relay DLCI mapp

LLC2 Routed over Frame Relay308635-14.00 Rev 002-9 Frame Relay to Physical MACFigure 2-5 illustrates a sample frame relay DLCI to physical MAC mapping

Configuring LLC Services2-10308635-14.00 Rev 00Figure 2-5. Frame Relay to Physical MAC TopologyFrame Relay to Frame RelayFigure 2-6 illustrates a samp

LLC2 Routed over Frame Relay308635-14.00 Rev 002-11 Router A always sets the source MAC address equal to the virtual MAC address, even if there is a r

308635-14.00 Rev 00vContents PrefaceBefore You Begin ...

Configuring LLC Services2-12308635-14.00 Rev 00LLC2 over Frame Relay: Routed versus BridgedFigure 2-7 illustrates (a) SNA over frame relay with source

308635-14.00 Rev 003-1 Chapter 3Starting LLC ServicesThis chapter describes how to create a basic LLC configuration by specifying values for required

Configuring LLC Services3-2308635-14.00 Rev 00Starting Configuration ToolsBefore configuring LLC services, refer to the following user guides for inst

Starting LLC Services308635-14.00 Rev 003-3 Figure 3-1. LLC2 Configuration HierarchyStarting LLC2 on a RouterWith frame relay in native mode and sourc

Configuring LLC Services3-4308635-14.00 Rev 00Using the BCCThe following sections describe how to configure LLC2 on the router.Configuring LLC2 Global

Starting LLC Services308635-14.00 Rev 003-5 3.Display LLC2 default settings.llc2/ethernet/2/1# infosrb-ring-id 0fr-virtual-mask <not_set>max-ui-

Configuring LLC Services3-6308635-14.00 Rev 00Configuring LLC2 on an FDDI InterfaceTo configure LLC2 on an FDDI interface with default settings, in co

Starting LLC Services308635-14.00 Rev 003-7 Starting DLSw and LLC2 over Frame RelayWhen configuring DLSw and LLC2 over frame relay, IBM provides two t

Configuring LLC Services3-8308635-14.00 Rev 00Starting DLSw and LLC2 over Frame Relay BNNBecause BNN format does not carry the destination MAC address

Starting LLC Services308635-14.00 Rev 003-9 To start DLSw and LLC2 over frame relay BNN, complete the following tasks:Site Manager ProcedureYou do thi

vi308635-14.00 Rev 00Chapter 2 LLC2 Routed over Frame RelayCompatibility with RFC 1490 ...

Configuring LLC Services3-10308635-14.00 Rev 00Starting APPN and LLC2 over Frame RelayTo start APPN and LLC2 over frame relay, complete the following

Starting LLC Services308635-14.00 Rev 003-11 10. Set the DLCI and SAP parameters.Refer to Configuring APPN Services for descriptions of the parameters

308635-14.00 Rev 004-1 Chapter 4Customizing LLC ServicesWhen you start LLC on the router, default values are in effect for all parameters. Depending o

Configuring LLC Services4-2308635-14.00 Rev 00For example, the following command line disables LLC2 on the router:llc2# disablellc2#To reenable LLC2,

Customizing LLC Services308635-14.00 Rev 004-3 Disabling and Reenabling an LLC2 InterfaceThe following sections describe how to disable and enable LLC

Configuring LLC Services4-4308635-14.00 Rev 00Configuring the Window SizeIn LLC, a window controls how many frames a link station sends before receivi

Customizing LLC Services308635-14.00 Rev 004-5 Specifying the Maximum Number of Outstanding Information PDUsThe following sections describe how to spe

Configuring LLC Services4-6308635-14.00 Rev 00Using Site ManagerTo specify the maximum number of information PDUs that can be outstanding at any given

Customizing LLC Services308635-14.00 Rev 004-7 For example, the following command changes the maximum size of the UI and I PDU to 4000 and 3000, respe

308635-14.00 Rev 00viiConfiguring Timers ...4-7Specify

Configuring LLC Services4-8308635-14.00 Rev 00Using the BCCTo configure the LLC2 timers, navigate to the llc2 interface prompt (for example, box; ethe

Customizing LLC Services308635-14.00 Rev 004-9 Specifying the Maximum Number of PDU Retries After TimeoutThe following sections describe how to specif

Configuring LLC Services4-10308635-14.00 Rev 00Setting the Maximum Number of LLC2 Interface ConnectionsThe following sections describe how to set the

Customizing LLC Services308635-14.00 Rev 004-11 Using Site ManagerTo specify the maximum number of logically independent, end-to-end connections the l

Configuring LLC Services4-12308635-14.00 Rev 00To configure the frame relay virtual MAC address mask, complete the following tasks:Editing Frame Relay

Customizing LLC Services308635-14.00 Rev 004-13 Configuring the LLC Virtual Ring Number for APPN with SRBTo specify a ring number for LLC to use if yo

Configuring LLC Services4-14308635-14.00 Rev 00Deleting LLC2 from an InterfaceThe following sections describe how to remove LLC2 from an interface usi

Customizing LLC Services308635-14.00 Rev 004-15 Deleting LLC2 from the RouterThe following sections describe how to remove LLC2 from a router entirely

308635-14.00 Rev 00A-1Appendix ASite Manager ParametersThis appendix describes configurable LLC service parameters. The parameter descriptions follow

Configuring LLC ServicesA-2308635-14.00 Rev 00Accessing LLC ParametersTo access and edit LLC parameters, begin at the Configuration Manager window and

Site Manager Parameters308635-14.00 Rev 00A-3Figure A-1. LLC2 Frame Relay Mapping Add WindowParameter:DLCIPath: Configuration Manager > Protocols &

Configuring LLC ServicesA-4308635-14.00 Rev 00LLC2 Frame Relay Mappings ParametersThe LLC2 Frame Relay Mappings window (Figure A-2) allows you to edit

Site Manager Parameters308635-14.00 Rev 00A-5Figure A-2. LLC2 Frame Relay Mappings WindowParameter:Remote MACPath: Configuration Manager > Protocol

Configuring LLC ServicesA-6308635-14.00 Rev 00LLC2 Global ParametersThe Edit LLC2 Global Parameters window (Figure A-3) lets you enable or disable LLC

Site Manager Parameters308635-14.00 Rev 00A-7LLC2 Interface ParametersThe LLC2 Interface Configuration window (Figure A-4) lets you customize LLC2 int

Configuring LLC ServicesA-8308635-14.00 Rev 00Figure A-4. LLC2 Interface Configuration WindowParameter:EnablePath: Protocols > LLC2 > Interfaces

Site Manager Parameters308635-14.00 Rev 00A-9Parameter:Max Octets in UIPath: Protocols > LLC2 > InterfacesDefault:5128 (octets)Options:1 to 5128

Configuring LLC ServicesA-10308635-14.00 Rev 00Parameter:Receive WindowPath: Protocols > LLC2 > InterfacesDefault:7 (PDUs)Options:1 to 127Functi

Site Manager Parameters308635-14.00 Rev 00A-11Parameter:Send WindowPath: Protocols > LLC2 > InterfacesDefault:7 (PDUs)Options:1 to 127Function:S

308635-14.00 Rev 00ixFiguresFigure 1-1. Sample Frame Relay Network ...1-4Figure 1-2. Th

Configuring LLC ServicesA-12308635-14.00 Rev 00Parameter:Ack Timer for XmtPath: Protocols > LLC2 > InterfacesDefault:1 (s)Options:1 to 15Functio

Site Manager Parameters308635-14.00 Rev 00A-13Parameter:Reject TimerPath: Protocols > LLC2 > InterfacesDefault:1 (s)Options:1 to 30 Function:Spe

Configuring LLC ServicesA-14308635-14.00 Rev 00Parameter:Inactivity TimerPath: Protocols > LLC2 > InterfacesDefault:30 (s)Options:1 to 30Functio

Site Manager Parameters308635-14.00 Rev 00A-15Parameter:Frame Relay Virtual MAC Address MaskPath: Protocols > LLC2 > InterfacesDefault:0x400000F

308635-14.00 Rev 00B-1 Appendix BMonitoring LLC Using the BCC show CommandsThis appendix describes how to use the BCC show command to obtain LLC data

Configuring LLC ServicesB-2308635-14.00 Rev 00show llc2 allThe show llc2 all command shows all the information you can display using the show llc2 int

Monitoring LLC Using the BCC show Commands308635-14.00 Rev 00B-3 show llc2 interfacesThe show llc2 interfaces command displays general information abo

Configuring LLC ServicesB-4308635-14.00 Rev 00show llc2 linksThe show llc2 links command displays general information about connections on the router.

Monitoring LLC Using the BCC show Commands308635-14.00 Rev 00B-5 show llc2 summaryThe show llc2 summary command displays general information about LLC